Use cases of docker with an example.

Docker has various applications, it can be used to host production websites/applications/Database etc. and in result they use very less system resources.

Also, their wide use case is actually at the time of testing application/website.

For eg- Let’s say you have to test SSL functionality of apache, instead of using virtualization and installing guest OS once can simply install docker and launch apache app as a service within one of the containers and check for SSL configurations.